***THIS IS NOT TESTED IN FULL AND WOULD REQUIRE MORE LOGGING TO CONFIRM***

I have been reading through all the Lean Spool threads that are floating around and have not seen anything that would allow me to easily switch between a map that has LS enabled to disabled.

So I put together a quick spreadsheet that maps LS Enabled to LS Disabled AFR mapping and wanted to share this with the community and get some feedback/comments on what i have done.

The attached 'LSTunedConversion_Stock' spreadsheet basically maps out all the AFRs that are converted when using Lean Spool. So the Base AFR to its equivalent LS AFR. It is configured for both Big and Small fuel maps and all you have to do is paste your current LS Enabled fuel map to the relevant tab and it will then spit out a map that you can use when disabling Lean Spool.

The first tab maps out all the AFR points from the 'Lean Spool AFR Mapping' table. It then takes an average of the change in AFR between each map point (Base AFR) to determine what the AFR would be for that specific AFR (AFR). I then inputed all the values into ECUFlash to get the final AFR plotted (Map AFR). I have also added a graph for each AFR mapping to confirm that it still follows the end AFR result.

the second tab is just a simple copy and paste of the Base AFR and Map AFR
which is then used in the remaining tabs.

NOTE: ON MY ROM I HAVE SET THE LS START AND STOP TO 2500 & 7500 RESPECTIVELY. YOU WILL NEED TO MODIFY THE FORMULAS FOR DIFFERENT START AND STOP

the third tab (LS Tune Enabled AFR Big) is where you would paste your current fuel map that has been created with LS enabled. The areas highlited in red are the LS Enabled areas which will be changed for LS disabled fuel. If your LOAD and RPM axis are different to stock, you will need to modify them on this and the following tab for it to work correctly.

the fourth tab (LS Disabled AFR Big) is the end result of the conversion. this is what you copy and paste back to ECU Flash to get your new fuel map with LS disabled. again hte red highlighted cells are the AFRs that were changed.

the last 2 tabs are the same as the fourth and fifth, but is to be used for small maps.

I have done this to my car already and have done 1 run in both scenarios (LSEnabled original MAP (red) & LS Disabled converted MAP (blue)) and the result is in the attached image. This was done on the exact same stretch of road just a couple min apart.

you can see it follows the AFR map almost exactly. obviously i need to log alot more, but from what i can see i am off slightly from 4500-5500 by .25 AFR and from 5500 onwards by about .5 AFR. Funnily enough i seemed to have gained 15awkw but torque was exactly the same.

I hope this will be useful to others out there that want to easily switch to LS Disabled and maintain their AFRs to close to original without too much fuss.

Lastly i have also done one which reverses the scenario (LS Disabled to Enabled). My intent here is to tune the car with LS Disabled and then eacily turn it on with little fuss and retuning. This way i get to keep the safety of Lean Spool.

Enjoy!!!

Cheers

 

Very cool spreadsheet - many thanks - you just saved me hours

 

your welcome mate, iv been using this spreadsheet for a while and had absolutely no issues other than needing to fine tune things as per the above.

cheers

 

Hey 07 - I couldn't find the Non-LS to LS conversion sheet you mention so I flipped yours around to suit - Here you go.